Questões de EFAI Matemática

In a small town in the countryside, every year a survey of the number of inhabitants of the city is made. This year, the survey revealed that the number of inhabitants of the city grew, reaching the number of $170,533$ inhabitants.

What is the correct writing of the number of people in this city in words?

Bianca was watching the news on television with her mother when she noticed that a decimal number was displayed on the screen:

As Bianca was learning about decimal numbers, she decided to write down the number in her notebook.

The correct spelling, in words, of the number seen by Bianca is

Marcos keeps coins in his piggy bank and, at the end of the month, he counts how many coins he saved to buy a toy of his choice. At the end of this month, Marcos managed to save $1625$ cent coins, as shown in the image:

Available at: https://www.shutterstock.com/pt/image-photo/brazilian-25-centavos-de-real-2021-2067000062. Accessed 9 Nov. 2022.

What is the most expensive toy Marcos will be able to buy?

Lucas went to a toy store looking for a soccer ball. Below is the only soccer ball for sale in the store:

Lucas decided to buy the ball and paid with the following bill:

How much change did Lucas receive?

A currency exchange office is a place where you can exchange currencies from different countries. A common exchange is real (R$) to US dollar (US$). Look at the equivalence of these two currencies:

A person will exchange the following amount for dollars at the currency exchange office:

Which alternative illustrates the amount, in dollars, that the person will get?

Em uma atividade, a professora estava ditando números decimais, e os alunos precisavam marcar em seus cadernos exatamente o número ditado pela professora. Um dos números ditados foi:

“Trinta e dois inteiros e quatro centésimos.”

A anotação correta do número ditado pela professora é